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Diffstat (limited to 'ext/pybind11/tests/test_python_types.py')
| -rw-r--r-- | ext/pybind11/tests/test_python_types.py | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/ext/pybind11/tests/test_python_types.py b/ext/pybind11/tests/test_python_types.py new file mode 100644 index 000000000..9fe1ef71e --- /dev/null +++ b/ext/pybind11/tests/test_python_types.py @@ -0,0 +1,402 @@ +import pytest + +from pybind11_tests import ExamplePythonTypes, ConstructorStats, has_optional, has_exp_optional + + +def test_static(): + ExamplePythonTypes.value = 15 + assert ExamplePythonTypes.value == 15 + assert ExamplePythonTypes.value2 == 5 + + with pytest.raises(AttributeError) as excinfo: + ExamplePythonTypes.value2 = 15 + assert str(excinfo.value) == "can't set attribute" + + +def test_instance(capture): + with pytest.raises(TypeError) as excinfo: + ExamplePythonTypes() + assert str(excinfo.value) == "pybind11_tests.ExamplePythonTypes: No constructor defined!" + + instance = ExamplePythonTypes.new_instance() + + with capture: + dict_result = instance.get_dict() + dict_result['key2'] = 'value2' + instance.print_dict(dict_result) + assert capture.unordered == """ + key: key, value=value + key: key2, value=value2 + """ + with capture: + dict_result = instance.get_dict_2() + dict_result['key2'] = 'value2' + instance.print_dict_2(dict_result) + assert capture.unordered == """ + key: key, value=value + key: key2, value=value2 + """ + with capture: + set_result = instance.get_set() + set_result.add('key4') + instance.print_set(set_result) + assert capture.unordered == """ + key: key1 + key: key2 + key: key3 + key: key4 + """ + with capture: + set_result = instance.get_set2() + set_result.add('key3') + instance.print_set_2(set_result) + assert capture.unordered == """ + key: key1 + key: key2 + key: key3 + """ + with capture: + list_result = instance.get_list() + list_result.append('value2') + instance.print_list(list_result) + assert capture.unordered == """ + Entry at position 0: value + list item 0: overwritten + list item 1: value2 + """ + with capture: + list_result = instance.get_list_2() + list_result.append('value2') + instance.print_list_2(list_result) + assert capture.unordered == """ + list item 0: value + list item 1: value2 + """ + with capture: + list_result = instance.get_list_2() + list_result.append('value2') + instance.print_list_2(tuple(list_result)) + assert capture.unordered == """ + list item 0: value + list item 1: value2 + """ + array_result = instance.get_array() + assert array_result == ['array entry 1', 'array entry 2'] + with capture: + instance.print_array(array_result) + assert capture.unordered == """ + array item 0: array entry 1 + array item 1: array entry 2 + """ + varray_result = instance.get_valarray() + assert varray_result == [1, 4, 9] + with capture: + instance.print_valarray(varray_result) + assert capture.unordered == """ + valarray item 0: 1 + valarray item 1: 4 + valarray item 2: 9 + """ + with pytest.raises(RuntimeError) as excinfo: + instance.throw_exception() + assert str(excinfo.value) == "This exception was intentionally thrown." + + assert instance.pair_passthrough((True, "test")) == ("test", True) + assert instance.tuple_passthrough((True, "test", 5)) == (5, "test", True) + # Any sequence can be cast to a std::pair or std::tuple + assert instance.pair_passthrough([True, "test"]) == ("test", True) + assert instance.tuple_passthrough([True, "test", 5]) == (5, "test", True) + + assert instance.get_bytes_from_string().decode() == "foo" + assert instance.get_bytes_from_str().decode() == "bar" + assert instance.get_str_from_string().encode().decode() == "baz" + assert instance.get_str_from_bytes().encode().decode() == "boo" + + class A(object): + def __str__(self): + return "this is a str" + + def __repr__(self): + return "this is a repr" + + with capture: + instance.test_print(A()) + assert capture == """ + this is a str + this is a repr + """ + + cstats = ConstructorStats.get(ExamplePythonTypes) + assert cstats.alive() == 1 + del instance + assert cstats.alive() == 0 + + +def test_docs(doc): + assert doc(ExamplePythonTypes) == "Example 2 documentation" + assert doc(ExamplePythonTypes.get_dict) == """ + get_dict(self: m.ExamplePythonTypes) -> dict + + Return a Python dictionary + """ + assert doc(ExamplePythonTypes.get_dict_2) == """ + get_dict_2(self: m.ExamplePythonTypes) -> Dict[str, str] + + Return a C++ dictionary + """ + assert doc(ExamplePythonTypes.get_list) == """ + get_list(self: m.ExamplePythonTypes) -> list + + Return a Python list + """ + assert doc(ExamplePythonTypes.get_list_2) == """ + get_list_2(self: m.ExamplePythonTypes) -> List[str] + + Return a C++ list + """ + assert doc(ExamplePythonTypes.get_dict) == """ + get_dict(self: m.ExamplePythonTypes) -> dict + + Return a Python dictionary + """ + assert doc(ExamplePythonTypes.get_set) == """ + get_set(self: m.ExamplePythonTypes) -> set + + Return a Python set + """ + assert doc(ExamplePythonTypes.get_set2) == """ + get_set2(self: m.ExamplePythonTypes) -> Set[str] + + Return a C++ set + """ + assert doc(ExamplePythonTypes.get_array) == """ + get_array(self: m.ExamplePythonTypes) -> List[str[2]] + + Return a C++ array + """ + assert doc(ExamplePythonTypes.get_valarray) == """ + get_valarray(self: m.ExamplePythonTypes) -> List[int] + + Return a C++ valarray + """ + assert doc(ExamplePythonTypes.print_dict) == """ + print_dict(self: m.ExamplePythonTypes, arg0: dict) -> None + + Print entries of a Python dictionary + """ + assert doc(ExamplePythonTypes.print_dict_2) == """ + print_dict_2(self: m.ExamplePythonTypes, arg0: Dict[str, str]) -> None + + Print entries of a C++ dictionary + """ + assert doc(ExamplePythonTypes.print_set) == """ + print_set(self: m.ExamplePythonTypes, arg0: set) -> None + + Print entries of a Python set + """ + assert doc(ExamplePythonTypes.print_set_2) == """ + print_set_2(self: m.ExamplePythonTypes, arg0: Set[str]) -> None + + Print entries of a C++ set + """ + assert doc(ExamplePythonTypes.print_list) == """ + print_list(self: m.ExamplePythonTypes, arg0: list) -> None + + Print entries of a Python list + """ + assert doc(ExamplePythonTypes.print_list_2) == """ + print_list_2(self: m.ExamplePythonTypes, arg0: List[str]) -> None + + Print entries of a C++ list + """ + assert doc(ExamplePythonTypes.print_array) == """ + print_array(self: m.ExamplePythonTypes, arg0: List[str[2]]) -> None + + Print entries of a C++ array + """ + assert doc(ExamplePythonTypes.pair_passthrough) == """ + pair_passthrough(self: m.ExamplePythonTypes, arg0: Tuple[bool, str]) -> Tuple[str, bool] + + Return a pair in reversed order + """ + assert doc(ExamplePythonTypes.tuple_passthrough) == """ + tuple_passthrough(self: m.ExamplePythonTypes, arg0: Tuple[bool, str, int]) -> Tuple[int, str, bool] + + Return a triple in reversed order + """ # noqa: E501 line too long + assert doc(ExamplePythonTypes.throw_exception) == """ + throw_exception(self: m.ExamplePythonTypes) -> None + + Throw an exception + """ + assert doc(ExamplePythonTypes.new_instance) == """ + new_instance() -> m.ExamplePythonTypes + + Return an instance + """ + + +def test_module(): + import pybind11_tests + + assert pybind11_tests.__name__ == "pybind11_tests" + assert ExamplePythonTypes.__name__ == "ExamplePythonTypes" + assert ExamplePythonTypes.__module__ == "pybind11_tests" + assert ExamplePythonTypes.get_set.__name__ == "get_set" + assert ExamplePythonTypes.get_set.__module__ == "pybind11_tests" + + +def test_print(capture): + from pybind11_tests import test_print_function + + with capture: + test_print_function() + assert capture == """ + Hello, World! + 1 2.0 three True -- multiple args + *args-and-a-custom-separator + no new line here -- next print + flush + py::print + str.format = this + """ + assert capture.stderr == "this goes to stderr" + + +def test_str_api(): + from pybind11_tests import test_str_format + + s1, s2 = test_str_format() + assert s1 == "1 + 2 = 3" + assert s1 == s2 + + +def test_dict_api(): + from pybind11_tests import test_dict_keyword_constructor + + assert test_dict_keyword_constructor() == {"x": 1, "y": 2, "z": 3} + + +def test_accessors(): + from pybind11_tests import test_accessor_api, test_tuple_accessor, test_accessor_assignment + + class SubTestObject: + attr_obj = 1 + attr_char = 2 + + class TestObject: + basic_attr = 1 + begin_end = [1, 2, 3] + d = {"operator[object]": 1, "operator[char *]": 2} + sub = SubTestObject() + + def func(self, x, *args): + return self.basic_attr + x + sum(args) + + d = test_accessor_api(TestObject()) + assert d["basic_attr"] == 1 + assert d["begin_end"] == [1, 2, 3] + assert d["operator[object]"] == 1 + assert d["operator[char *]"] == 2 + assert d["attr(object)"] == 1 + assert d["attr(char *)"] == 2 + assert d["missing_attr_ptr"] == "raised" + assert d["missing_attr_chain"] == "raised" + assert d["is_none"] is False + assert d["operator()"] == 2 + assert d["operator*"] == 7 + + assert test_tuple_accessor(tuple()) == (0, 1, 2) + + d = test_accessor_assignment() + assert d["get"] == 0 + assert d["deferred_get"] == 0 + assert d["set"] == 1 + assert d["deferred_set"] == 1 + assert d["var"] == 99 + + +@pytest.mark.skipif(not has_optional, reason='no <optional>') +def test_optional(): + from pybind11_tests import double_or_zero, half_or_none, test_nullopt + + assert double_or_zero(None) == 0 + assert double_or_zero(42) == 84 + pytest.raises(TypeError, double_or_zero, 'foo') + + assert half_or_none(0) is None + assert half_or_none(42) == 21 + pytest.raises(TypeError, half_or_none, 'foo') + + assert test_nullopt() == 42 + assert test_nullopt(None) == 42 + assert test_nullopt(42) == 42 + assert test_nullopt(43) == 43 + + +@pytest.mark.skipif(not has_exp_optional, reason='no <experimental/optional>') +def test_exp_optional(): + from pybind11_tests import double_or_zero_exp, half_or_none_exp, test_nullopt_exp + + assert double_or_zero_exp(None) == 0 + assert double_or_zero_exp(42) == 84 + pytest.raises(TypeError, double_or_zero_exp, 'foo') + + assert half_or_none_exp(0) is None + assert half_or_none_exp(42) == 21 + pytest.raises(TypeError, half_or_none_exp, 'foo') + + assert test_nullopt_exp() == 42 + assert test_nullopt_exp(None) == 42 + assert test_nullopt_exp(42) == 42 + assert test_nullopt_exp(43) == 43 + + +def test_constructors(): + """C++ default and converting constructors are equivalent to type calls in Python""" + from pybind11_tests import (test_default_constructors, test_converting_constructors, + test_cast_functions) + + types = [str, bool, int, float, tuple, list, dict, set] + expected = {t.__name__: t() for t in types} + assert test_default_constructors() == expected + + data = { + str: 42, + bool: "Not empty", + int: "42", + float: "+1e3", + tuple: range(3), + list: range(3), + dict: [("two", 2), ("one", 1), ("three", 3)], + set: [4, 4, 5, 6, 6, 6], + memoryview: b'abc' + } + inputs = {k.__name__: v for k, v in data.items()} + expected = {k.__name__: k(v) for k, v in data.items()} + assert test_converting_constructors(inputs) == expected + assert test_cast_functions(inputs) == expected + + +def test_move_out_container(): + """Properties use the `reference_internal` policy by default. If the underlying function + returns an rvalue, the policy is automatically changed to `move` to avoid referencing + a temporary. In case the return value is a container of user-defined types, the policy + also needs to be applied to the elements, not just the container.""" + from pybind11_tests import MoveOutContainer + + c = MoveOutContainer() + moved_out_list = c.move_list + assert [x.value for x in moved_out_list] == [0, 1, 2] + + +def test_implicit_casting(): + """Tests implicit casting when assigning or appending to dicts and lists.""" + from pybind11_tests import get_implicit_casting + + z = get_implicit_casting() + assert z['d'] == { + 'char*_i1': 'abc', 'char*_i2': 'abc', 'char*_e': 'abc', 'char*_p': 'abc', + 'str_i1': 'str', 'str_i2': 'str1', 'str_e': 'str2', 'str_p': 'str3', + 'int_i1': 42, 'int_i2': 42, 'int_e': 43, 'int_p': 44 + } + assert z['l'] == [3, 6, 9, 12, 15] |